CN104060835A - Lifting-sliding construction method for single plane truss - Google Patents
Lifting-sliding construction method for single plane truss Download PDFInfo
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- CN104060835A CN104060835A CN201410179794.2A CN201410179794A CN104060835A CN 104060835 A CN104060835 A CN 104060835A CN 201410179794 A CN201410179794 A CN 201410179794A CN 104060835 A CN104060835 A CN 104060835A
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- 238000010276 construction Methods 0.000 title claims abstract description 135
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 88
- 239000010959 steel Substances 0.000 claims abstract description 88
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000009434 installation Methods 0.000 claims description 50
- 239000000725 suspension Substances 0.000 claims description 45
- 230000001360 synchronised effect Effects 0.000 claims description 25
- 238000005516 engineering process Methods 0.000 claims description 21
- 238000000465 moulding Methods 0.000 claims description 20
- 238000006073 displacement reaction Methods 0.000 claims description 15
- 238000013461 design Methods 0.000 claims description 11
- 230000001141 propulsive effect Effects 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000012937 correction Methods 0.000 claims description 5
- 238000005183 dynamical system Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 5
- 238000007689 inspection Methods 0.000 claims description 5
- 238000011900 installation process Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 5
- 238000000275 quality assurance Methods 0.000 claims description 5
- 238000005728 strengthening Methods 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 5
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- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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Abstract
The invention relates to a lifting-sliding construction method, in particular to a lifting-sliding construction method for a single plane truss, which is applied to the technical field of building steel structure construction. The method comprises the following steps: analysis and positioning of construction equipment, analysis of construction techniques, safety analysis before construction, scheme determination before construction and official construction. The lifting-sliding construction method for the single plane truss is compact in structure, has relatively lower equipment requirements, improves the construction efficiency and construction safety and reduces the construction cost.
Description
Technical field
The present invention relates to a kind of sliding and lifting construction method, relate in particular to a kind of sliding and lifting construction method of single Pin plane frame, be applied to construction steel structure technical field of construction.
Background technology
In the heavy constructions such as all kinds of steel work venues, train station, airport, highrise building, constantly used in recent years steel work, steel work architectural use with and novel unique shape-designing, fully demonstrated the mankind's creativity and the fine pursuit for art of architecture.For meeting Architectural Design Requirements, adopt in a large number steel structure member, Steel Structure Installation is had higher requirement.Due to the restriction of Steel Structure Installation height, the restriction that construction plant is narrow and small, loop wheel machine lifts heavily quantitative limitation, now can consider other constructure scheme such as slippage or lifting.As: in skifield, Harbin steel work, the single truss structure weight between V-type post reaches 240t left and right, and truss rise reaches 10m, and length is 45m, and setting height(from bottom) is 85m.This truss is installed and will be selected super large lifting machine, be unfavorable for saving construction cost, general loop wheel machine cannot meet its lifting requirements.
Civil engineering is constructed in advance, causes the structural steelwork of Steel Structure Installation difficulty, and as the steel roof structure of all kinds of stadiums, because civil engineering area is large, civil engineering can not be given way to Steel Structure Installation, and therefore steel work is generally taked the mode of rear installation.If but roof structure is heavier larger, adopt general Hoisting Program more difficult, can consider the constructure scheme of slippage or lifting.
Summary of the invention
The present invention solves the deficiencies in the prior art, and a kind of compact conformation is provided, and constructs convenient, reduces the sliding and lifting construction method of a kind of single Pin plane frame of use cost.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals:
A sliding and lifting construction method for single Pin plane frame, carry out according to the following steps:
(1), construction equipment analysis and location:
This construction equipment is made up of three parts: executing agency, control system, power set;
1), executing agency: the combination of core-theaded type jack and crawl device, directly control the running orbit of weight;
2), control system; Formed by hydraulic control system, computer control system and information system three parts, utilize feedback signal and input instruction to control hydraulic work system, make operand that set requirement campaign is installed;
3), dynamical system: provide the energy for control system by hydraulic power unit and hydraulic drive;
The movement locus of construction equipment control weight:
1), level of synchronization or vertical line motion;
2), synchronous curvilinear motion;
3), the fine motion after installation is done;
Synchronization action comprises action synchronously and the synchronous two kinds of actions in position, according to the needed running orbit of installing component, calculate each suspension centre operation displacement difference, and feed back by real-time displacement, utilize the each suspension centre operation of computer control displacement, guarantee that weight advances by track in handling process, can carry out straight line or curvilinear motion;
In Synchronous lifting and slipping, operating personnel can set main lifting and the sliding velocity that makes suspension centre according to the uninterrupted of pumping plant, have also just determined the speed of whole system simultaneously;
Fine setting after installation: refer in installation process, can control separately certain local devices carry out trace regulate so that install time to bit correction;
(2), Analysis of Construction Technique:
1), vertical-lift technology;
Vertical-lift technology adopts core formula jack just putting to carry out, and using core-theaded type jack as trailing equipment, flexible steel twisted wire is as load-bearing rigging, has safety, a series of particular advantages such as reliable, supporting part own wt is light, easy transportation and installation;
2), horizontal sliding technology:
Adopt hydraulic levels slippage, different from traditional steel wire rope of windlass traction, thrusting slip starts and when braking, can not make because there being the extension of flexible steel twisted wire steel work shake or vibration, and the propulsive force of hydraulic pressure creep machine slipping and fltting speed can be surveyed completely with controlled;
Computer system detects propulsive force and the speed of hydraulic pressure creep machine by sensor, control the coordinate synchronization between each crawl device, when there being unexpected overload or synchronous when overproof, system can adjust and send alarm signal in time, thereby makes slipping more safe and reliable;
(3), the safety analysis before construction:
1), jack requires supporting base plane gradient to be not more than 3/1000 while installation, in the time not automatically not adjusting curved support, should be not more than 1/1000;
2), in order to make, every steel strand are stressed identically will carry out pretension, on jury anchor, put a tune anchor dish, with the mono-anchor jack of YC20, every steel strand are pulled to 4MPa, carry out diagonal angle operation outward after in should be first when pretension, confirm that on inspection steel strand wear to errorless, not beat after strand phenomenon, put down safety anchor, the oil cylinder deflation cylinder that casts anchor;
3), cable wire bundle safety factor is 3;
4), hydraulic test operates steadily, good reliability, speed general control is at 8-18m/h;
5), intervals should be less than 15cm between two tracks of sliding rail, two sections are not left baffle plate, and the safe end of 1-2m is set;
(4), the scheme before construction is determined:
1), determine which kind of construction technology according to steel work design feature, before Steel Structure Installation, the various feasible schemes of Steel Structure Installation are discussed, are chosen the best alternatives according to duration, safety, quality assurance, economic serviceability, construction condition;
2), establish the fundamental order of construction: divide construction cell and construction area;
Construction of Steel Structure, according to steel work independence and structure types, is analyzed the lifting order of steel work, and then is divided construction cell and construction area;
3), establish the size of trolley units and set up work information according to sequence of construction;
4), select suspension centre, and member is carried out to stress and deformation analysis:
Before steel structure hoisting construction, should carry out computer stress and deformation analysis, if do not met the demands, carry out structural strengthening or suspension centre gravity treatment, guarantee to meet construction requirement;
5), set up and promote and slippage work system:
6), scheme formation, formally construction;
(5), formal construction sequence:
1), truss ground moulding bed is arranged:
Moulding bed adopts H shaped steel combination moulding bed, and specification is H300x200x6x8, and truss is the sleeping spelling of ground distributor and vertical spelling;
Truss overhead should reach 500mm, before truss is assembled, should carry out ground line, ensures the assembled quality of truss;
Between moulding bed, spacing should remain between 5m-8m, can suitably adjust;
2), assembled ground truss:
Truss installation on ground should adopt small-sized crane, and truss is assembled should follow first chord member, rear web member, the assembled order of first intermediate and then both sides;
3), truss is assembled completes, truss is set and promotes suspension centre.
Truss hoist point is arranged on apart between two sections of edge 500mm-1000mm of truss, and suspension centre is arranged on Nodes as far as possible, and suspension centre setting does not change the stressed relation of truss as far as possible, and part can reinforce according to stressing conditions temporarily;
4), truss is promoted to and calculates absolute altitude position:
Before truss promotes, check whether all measures of structure lift unit and liquid Synchronous lifting meet design requirement, confirm errorless after, start examination and promote, promote after about 150mm by lift unit, suspend and promote;
Again check the safety of whole Hoisting System, in lifting process, the Synchronization Control between each suspension centre requires in 10mm;
5), truss carries out horizontal sliding construction:
Before slippage, reply slide rail and trailer system check, measure slide rail absolute altitude with level gauge, also will send someone to observe in slipping;
Before formal slippage, first try to slide, to confirm the feasibility of constructure scheme and the reliability of slide device; Guarantee truss synchronization of jacking up or whereabouts, control service speed well, every jacking or transfer 50mm and check once; Guarantee that truss synchronously slides, adopt computer simultaneously operating, to control sliding speed, should not exceed 300mm/min, on two slide rails, delineate in addition the graduation mark at 500mm interval, observing and controlling in real time in slipping;
6), truss slides onto installation site:
Truss slides onto behind installation site, docks and is welded to connect;
7), truss frame for connecting, remove promote and slide device, construct complete.
Effect and the advantage of invention:
1. plant equipment requires low.
2. construction efficiency is high.
3. construction cost is low.
4. construction safety is high.5. construction quality easily ensures.
Therefore, the sliding and lifting construction method of a kind of single Pin plane frame of the present invention, compact conformation, relatively low to equipment requirement, improve efficiency of construction, reduce construction cost, lifting construction safety.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Description of reference numerals: 1, truss; 2, rail supported; 3, lifter.
Detailed description of the invention
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment 1: as shown in Figure 1, a kind of sliding and lifting construction method of single Pin plane frame, carry out according to the following steps:
(1), construction equipment analysis and location:
This construction equipment is made up of three parts: executing agency, control system, power set;
1), executing agency: the combination of core-theaded type jack and crawl device, directly control the running orbit of weight;
2), control system; Formed by hydraulic control system, computer control system and information system three parts, utilize feedback signal and input instruction to control hydraulic work system, make operand that set requirement campaign is installed;
3), dynamical system: provide the energy for control system by hydraulic power unit and hydraulic drive;
The movement locus of construction equipment control weight:
1), level of synchronization or vertical line motion;
2), synchronous curvilinear motion;
3), the fine motion after installation is done;
Synchronization action comprises action synchronously and the synchronous two kinds of actions in position, according to the needed running orbit of installing component, calculate each suspension centre operation displacement difference, and feed back by real-time displacement, utilize the each suspension centre operation of computer control displacement, guarantee that weight advances by track in handling process, can carry out straight line or curvilinear motion;
In Synchronous lifting and slipping, operating personnel can set main lifting and the sliding velocity that makes suspension centre according to the uninterrupted of pumping plant, have also just determined the speed of whole system simultaneously;
Fine setting after installation: refer in installation process, can control separately certain local devices carry out trace regulate so that install time to bit correction;
(2), Analysis of Construction Technique:
1), vertical-lift technology;
Vertical-lift technology adopts core formula jack just putting to carry out, and using core-theaded type jack as trailing equipment, flexible steel twisted wire is as load-bearing rigging, has safety, a series of particular advantages such as reliable, supporting part own wt is light, easy transportation and installation;
2), horizontal sliding technology:
Adopt hydraulic levels slippage, different from traditional steel wire rope of windlass traction, thrusting slip starts and when braking, can not make because there being the extension of flexible steel twisted wire steel work shake or vibration, and the propulsive force of hydraulic pressure creep machine slipping and fltting speed can be surveyed completely with controlled;
Computer system detects propulsive force and the speed of hydraulic pressure creep machine by sensor, control the coordinate synchronization between each crawl device, when there being unexpected overload or synchronous when overproof, system can adjust and send alarm signal in time, thereby makes slipping more safe and reliable;
(3), the safety analysis before construction:
1), jack requires supporting base plane gradient to be not more than 3/1000 while installation, in the time not automatically not adjusting curved support, should be not more than 1/1000;
2), in order to make, every steel strand are stressed identically will carry out pretension, on jury anchor, put a tune anchor dish, with the mono-anchor jack of YC20, every steel strand are pulled to 4MPa, carry out diagonal angle operation outward after in should be first when pretension, confirm that on inspection steel strand wear to errorless, not beat after strand phenomenon, put down safety anchor, the oil cylinder deflation cylinder that casts anchor;
3), cable wire bundle safety factor is 3;
4), hydraulic test operates steadily, good reliability, speed general control is at 8m/h;
5), intervals should be less than 15cm between two tracks of sliding rail, two sections are not left baffle plate, and the safe end of 1-2m is set;
(4), the scheme before construction is determined:
1), determine which kind of construction technology according to steel work design feature, before Steel Structure Installation, the various feasible schemes of Steel Structure Installation are discussed, are chosen the best alternatives according to duration, safety, quality assurance, economic serviceability, construction condition;
2), establish the fundamental order of construction: divide construction cell and construction area;
Construction of Steel Structure, according to steel work independence and structure types, is analyzed the lifting order of steel work, and then is divided construction cell and construction area;
3), establish the size of trolley units and set up work information according to sequence of construction;
4), select suspension centre, and member is carried out to stress and deformation analysis:
Before steel structure hoisting construction, should carry out computer stress and deformation analysis, if do not met the demands, carry out structural strengthening or suspension centre gravity treatment, guarantee to meet construction requirement;
5), set up and promote and slippage work system:
6), scheme formation, formally construction;
(5), formal construction sequence:
1), truss ground moulding bed is arranged:
Moulding bed adopts H shaped steel combination moulding bed, and specification is H300x200x6x8, and truss is the sleeping spelling of ground distributor and vertical spelling;
Truss overhead should reach 500mm, before truss is assembled, should carry out ground line, ensures the assembled quality of truss;
Between moulding bed, spacing should remain between 5m, can suitably adjust;
2), assembled ground truss:
Truss installation on ground should adopt small-sized crane, and truss is assembled should follow first chord member, rear web member, the assembled order of first intermediate and then both sides;
3), truss is assembled completes, truss is set and promotes suspension centre.
Truss hoist point is arranged on apart between two sections of edge 500mm of truss, and suspension centre is arranged on Nodes as far as possible, and suspension centre setting does not change the stressed relation of truss as far as possible, and part can reinforce according to stressing conditions temporarily;
4), truss is promoted to and calculates absolute altitude position:
Before truss promotes, check whether all measures of structure lift unit and liquid Synchronous lifting meet design requirement, confirm errorless after, start examination and promote, promote after about 150mm by lift unit, suspend and promote;
Again check the safety of whole Hoisting System, in lifting process, the Synchronization Control between each suspension centre requires in 10mm;
5), truss carries out horizontal sliding construction:
Before slippage, reply slide rail and trailer system check, measure slide rail absolute altitude with level gauge, also will send someone to observe in slipping;
Before formal slippage, first try to slide, to confirm the feasibility of constructure scheme and the reliability of slide device; Guarantee truss synchronization of jacking up or whereabouts, control service speed well, every jacking or transfer 50mm and check once; Guarantee that truss synchronously slides, adopt computer simultaneously operating, to control sliding speed, should not exceed 300mm/min, on two slide rails, delineate in addition the graduation mark at 500mm interval, observing and controlling in real time in slipping;
6), truss slides onto installation site:
Truss slides onto behind installation site, docks and is welded to connect;
7), truss frame for connecting, remove promote and slide device, construct complete.
Embodiment 2: a kind of sliding and lifting construction method of single Pin plane frame, carry out according to the following steps:
(1), construction equipment analysis and location:
This construction equipment is made up of three parts: executing agency, control system, power set;
1), executing agency: the combination of core-theaded type jack and crawl device, directly control the running orbit of weight;
2), control system; Formed by hydraulic control system, computer control system and information system three parts, utilize feedback signal and input instruction to control hydraulic work system, make operand that set requirement campaign is installed;
3), dynamical system: provide the energy for control system by hydraulic power unit and hydraulic drive;
The movement locus of construction equipment control weight:
1), level of synchronization or vertical line motion;
2), synchronous curvilinear motion;
3), the fine motion after installation is done;
Synchronization action comprises action synchronously and the synchronous two kinds of actions in position, according to the needed running orbit of installing component, calculate each suspension centre operation displacement difference, and feed back by real-time displacement, utilize the each suspension centre operation of computer control displacement, guarantee that weight advances by track in handling process, can carry out straight line or curvilinear motion;
In Synchronous lifting and slipping, operating personnel can set main lifting and the sliding velocity that makes suspension centre according to the uninterrupted of pumping plant, have also just determined the speed of whole system simultaneously;
Fine setting after installation: refer in installation process, can control separately certain local devices carry out trace regulate so that install time to bit correction;
(2), Analysis of Construction Technique:
1), vertical-lift technology;
Vertical-lift technology adopts core formula jack just putting to carry out, and using core-theaded type jack as trailing equipment, flexible steel twisted wire is as load-bearing rigging, has safety, a series of particular advantages such as reliable, supporting part own wt is light, easy transportation and installation;
2), horizontal sliding technology:
Adopt hydraulic levels slippage, different from traditional steel wire rope of windlass traction, thrusting slip starts and when braking, can not make because there being the extension of flexible steel twisted wire steel work shake or vibration, and the propulsive force of hydraulic pressure creep machine slipping and fltting speed can be surveyed completely with controlled;
Computer system detects propulsive force and the speed of hydraulic pressure creep machine by sensor, control the coordinate synchronization between each crawl device, when there being unexpected overload or synchronous when overproof, system can adjust and send alarm signal in time, thereby makes slipping more safe and reliable;
(3), the safety analysis before construction:
1), jack requires supporting base plane gradient to be not more than 3/1000 while installation, in the time not automatically not adjusting curved support, should be not more than 1/1000;
2), in order to make, every steel strand are stressed identically will carry out pretension, on jury anchor, put a tune anchor dish, with the mono-anchor jack of YC20, every steel strand are pulled to 4MPa, carry out diagonal angle operation outward after in should be first when pretension, confirm that on inspection steel strand wear to errorless, not beat after strand phenomenon, put down safety anchor, the oil cylinder deflation cylinder that casts anchor;
3), cable wire bundle safety factor is 3;
4), hydraulic test operates steadily, good reliability, speed general control is at 12m/h;
5), intervals should be less than 15cm between two tracks of sliding rail, two sections are not left baffle plate, and the safe end of 1-2m is set;
(4), the scheme before construction is determined:
1), determine which kind of construction technology according to steel work design feature, before Steel Structure Installation, the various feasible schemes of Steel Structure Installation are discussed, are chosen the best alternatives according to duration, safety, quality assurance, economic serviceability, construction condition;
2), establish the fundamental order of construction: divide construction cell and construction area;
Construction of Steel Structure, according to steel work independence and structure types, is analyzed the lifting order of steel work, and then is divided construction cell and construction area;
3), establish the size of trolley units and set up work information according to sequence of construction;
4), select suspension centre, and member is carried out to stress and deformation analysis:
Before steel structure hoisting construction, should carry out computer stress and deformation analysis, if do not met the demands, carry out structural strengthening or suspension centre gravity treatment, guarantee to meet construction requirement;
5), set up and promote and slippage work system:
6), scheme formation, formally construction;
(5), formal construction sequence:
1), truss ground moulding bed is arranged:
Moulding bed adopts H shaped steel combination moulding bed, and specification is H300x200x6x8, and truss is the sleeping spelling of ground distributor and vertical spelling;
Truss overhead should reach 500mm, before truss is assembled, should carry out ground line, ensures the assembled quality of truss;
Between moulding bed, spacing should remain between 6m, can suitably adjust;
2), assembled ground truss:
Truss installation on ground should adopt small-sized crane, and truss is assembled should follow first chord member, rear web member, the assembled order of first intermediate and then both sides;
3), truss is assembled completes, truss is set and promotes suspension centre.
Truss hoist point is arranged on apart between two sections of edge 800mm of truss, and suspension centre is arranged on Nodes as far as possible, and suspension centre setting does not change the stressed relation of truss as far as possible, and part can reinforce according to stressing conditions temporarily;
4), truss is promoted to and calculates absolute altitude position:
Before truss promotes, check whether all measures of structure lift unit and liquid Synchronous lifting meet design requirement, confirm errorless after, start examination and promote, promote after about 150mm by lift unit, suspend and promote;
Again check the safety of whole Hoisting System, in lifting process, the Synchronization Control between each suspension centre requires in 10mm;
5), truss carries out horizontal sliding construction:
Before slippage, reply slide rail and trailer system check, measure slide rail absolute altitude with level gauge, also will send someone to observe in slipping;
Before formal slippage, first try to slide, to confirm the feasibility of constructure scheme and the reliability of slide device; Guarantee truss synchronization of jacking up or whereabouts, control service speed well, every jacking or transfer 50mm and check once; Guarantee that truss synchronously slides, adopt computer simultaneously operating, to control sliding speed, should not exceed 300mm/min, on two slide rails, delineate in addition the graduation mark at 500mm interval, observing and controlling in real time in slipping;
6), truss slides onto installation site:
Truss slides onto behind installation site, docks and is welded to connect;
7), truss frame for connecting, remove promote and slide device, construct complete.
Embodiment 3: a kind of sliding and lifting construction method of single Pin plane frame, carry out according to the following steps:
(1), construction equipment analysis and location:
This construction equipment is made up of three parts: executing agency, control system, power set;
1), executing agency: the combination of core-theaded type jack and crawl device, directly control the running orbit of weight;
2), control system; Formed by hydraulic control system, computer control system and information system three parts, utilize feedback signal and input instruction to control hydraulic work system, make operand that set requirement campaign is installed;
3), dynamical system: provide the energy for control system by hydraulic power unit and hydraulic drive;
The movement locus of construction equipment control weight:
1), level of synchronization or vertical line motion;
2), synchronous curvilinear motion;
3), the fine motion after installation is done;
Synchronization action comprises action synchronously and the synchronous two kinds of actions in position, according to the needed running orbit of installing component, calculate each suspension centre operation displacement difference, and feed back by real-time displacement, utilize the each suspension centre operation of computer control displacement, guarantee that weight advances by track in handling process, can carry out straight line or curvilinear motion;
In Synchronous lifting and slipping, operating personnel can set main lifting and the sliding velocity that makes suspension centre according to the uninterrupted of pumping plant, have also just determined the speed of whole system simultaneously;
Fine setting after installation: refer in installation process, can control separately certain local devices carry out trace regulate so that install time to bit correction;
(2), Analysis of Construction Technique:
1), vertical-lift technology;
Vertical-lift technology adopts core formula jack just putting to carry out, and using core-theaded type jack as trailing equipment, flexible steel twisted wire is as load-bearing rigging, has safety, a series of particular advantages such as reliable, supporting part own wt is light, easy transportation and installation;
2), horizontal sliding technology:
Adopt hydraulic levels slippage, different from traditional steel wire rope of windlass traction, thrusting slip starts and when braking, can not make because there being the extension of flexible steel twisted wire steel work shake or vibration, and the propulsive force of hydraulic pressure creep machine slipping and fltting speed can be surveyed completely with controlled;
Computer system detects propulsive force and the speed of hydraulic pressure creep machine by sensor, control the coordinate synchronization between each crawl device, when there being unexpected overload or synchronous when overproof, system can adjust and send alarm signal in time, thereby makes slipping more safe and reliable;
(3), the safety analysis before construction:
1), jack requires supporting base plane gradient to be not more than 3/1000 while installation, in the time not automatically not adjusting curved support, should be not more than 1/1000;
2), in order to make, every steel strand are stressed identically will carry out pretension, on jury anchor, put a tune anchor dish, with the mono-anchor jack of YC20, every steel strand are pulled to 4MPa, carry out diagonal angle operation outward after in should be first when pretension, confirm that on inspection steel strand wear to errorless, not beat after strand phenomenon, put down safety anchor, the oil cylinder deflation cylinder that casts anchor;
3), cable wire bundle safety factor is 3;
4), hydraulic test operates steadily, good reliability, speed general control is at 18m/h;
5), intervals should be less than 15cm between two tracks of sliding rail, two sections are not left baffle plate, and the safe end of 1-2m is set;
(4), the scheme before construction is determined:
1), determine which kind of construction technology according to steel work design feature, before Steel Structure Installation, the various feasible schemes of Steel Structure Installation are discussed, are chosen the best alternatives according to duration, safety, quality assurance, economic serviceability, construction condition;
2), establish the fundamental order of construction: divide construction cell and construction area;
Construction of Steel Structure, according to steel work independence and structure types, is analyzed the lifting order of steel work, and then is divided construction cell and construction area;
3), establish the size of trolley units and set up work information according to sequence of construction;
4), select suspension centre, and member is carried out to stress and deformation analysis:
Before steel structure hoisting construction, should carry out computer stress and deformation analysis, if do not met the demands, carry out structural strengthening or suspension centre gravity treatment, guarantee to meet construction requirement;
5), set up and promote and slippage work system:
6), scheme formation, formally construction;
(5), formal construction sequence:
1), truss ground moulding bed is arranged:
Moulding bed adopts H shaped steel combination moulding bed, and specification is H300x200x6x8, and truss is the sleeping spelling of ground distributor and vertical spelling;
Truss overhead should reach 500mm, before truss is assembled, should carry out ground line, ensures the assembled quality of truss;
Between moulding bed, spacing should remain between 8m, can suitably adjust;
2), assembled ground truss:
Truss installation on ground should adopt small-sized crane, and truss is assembled should follow first chord member, rear web member, the assembled order of first intermediate and then both sides;
3), truss is assembled completes, truss is set and promotes suspension centre.
Truss hoist point is arranged on apart between two sections of edge 1000mm of truss, and suspension centre is arranged on Nodes as far as possible, and suspension centre setting does not change the stressed relation of truss as far as possible, and part can reinforce according to stressing conditions temporarily;
4), truss is promoted to and calculates absolute altitude position:
Before truss promotes, check whether all measures of structure lift unit and liquid Synchronous lifting meet design requirement, confirm errorless after, start examination and promote, promote after about 150mm by lift unit, suspend and promote;
Again check the safety of whole Hoisting System, in lifting process, the Synchronization Control between each suspension centre requires in 10mm;
5), truss carries out horizontal sliding construction:
Before slippage, reply slide rail and trailer system check, measure slide rail absolute altitude with level gauge, also will send someone to observe in slipping;
Before formal slippage, first try to slide, to confirm the feasibility of constructure scheme and the reliability of slide device; Guarantee truss synchronization of jacking up or whereabouts, control service speed well, every jacking or transfer 50mm and check once; Guarantee that truss synchronously slides, adopt computer simultaneously operating, to control sliding speed, should not exceed 300mm/min, on two slide rails, delineate in addition the graduation mark at 500mm interval, observing and controlling in real time in slipping;
6), truss slides onto installation site:
Truss slides onto behind installation site, docks and is welded to connect;
7), truss frame for connecting, remove promote and slide device, construct complete.
Claims (2)
1. a sliding and lifting construction method for single Pin plane frame, is characterized in that carrying out according to the following steps:
(1), construction equipment analysis and location:
This construction equipment is made up of three parts: executing agency, control system, power set;
1), executing agency: the combination of core-theaded type jack and crawl device, directly control the running orbit of weight;
2), control system; Formed by hydraulic control system, computer control system and information system three parts, utilize feedback signal and input instruction to control hydraulic work system, make operand that set requirement campaign is installed;
3), dynamical system: provide the energy for control system by hydraulic power unit and hydraulic drive;
The movement locus of construction equipment control weight:
1), level of synchronization or vertical line motion;
2), synchronous curvilinear motion;
3), the fine motion after installation is done;
Synchronization action comprises action synchronously and the synchronous two kinds of actions in position, according to the needed running orbit of installing component, calculate each suspension centre operation displacement difference, and feed back by real-time displacement, utilize the each suspension centre operation of computer control displacement, guarantee that weight advances by track in handling process, can carry out straight line or curvilinear motion;
In Synchronous lifting and slipping, operating personnel can set main lifting and the sliding velocity that makes suspension centre according to the uninterrupted of pumping plant, have also just determined the speed of whole system simultaneously;
Fine setting after installation: refer in installation process, can control separately certain local devices carry out trace regulate so that install time to bit correction;
(2), Analysis of Construction Technique:
1), vertical-lift technology;
Vertical-lift technology adopts core formula jack just putting to carry out, and using core-theaded type jack as trailing equipment, flexible steel twisted wire is as load-bearing rigging, has safety, a series of particular advantages such as reliable, supporting part own wt is light, easy transportation and installation;
2), horizontal sliding technology:
Adopt hydraulic levels slippage, different from traditional steel wire rope of windlass traction, thrusting slip starts and when braking, can not make because there being the extension of flexible steel twisted wire steel work shake or vibration, and the propulsive force of hydraulic pressure creep machine slipping and fltting speed can be surveyed completely with controlled;
Computer system detects propulsive force and the speed of hydraulic pressure creep machine by sensor, control the coordinate synchronization between each crawl device, when there being unexpected overload or synchronous when overproof, system can adjust and send alarm signal in time, thereby makes slipping more safe and reliable;
(3), the safety analysis before construction:
1), jack requires supporting base plane gradient to be not more than 3/1000 while installation, in the time not automatically not adjusting curved support, should be not more than 1/1000;
2), in order to make, every steel strand are stressed identically will carry out pretension, on jury anchor, put a tune anchor dish, with the mono-anchor jack of YC20, every steel strand are pulled to 4MPa, carry out diagonal angle operation outward after in should be first when pretension, confirm that on inspection steel strand wear to errorless, not beat after strand phenomenon, put down safety anchor, the oil cylinder deflation cylinder that casts anchor;
3), cable wire bundle safety factor is 3;
4), hydraulic test operates steadily, good reliability, speed general control is at 8-18m/h;
5), intervals should be less than 15cm between two tracks of sliding rail, two sections are not left baffle plate, and the safe end of 1-2m is set;
(4), the scheme before construction is determined:
1), determine which kind of construction technology according to steel work design feature, before Steel Structure Installation, the various feasible schemes of Steel Structure Installation are discussed, are chosen the best alternatives according to duration, safety, quality assurance, economic serviceability, construction condition;
2), establish the fundamental order of construction: divide construction cell and construction area;
Construction of Steel Structure, according to steel work independence and structure types, is analyzed the lifting order of steel work, and then is divided construction cell and construction area;
3), establish the size of trolley units and set up work information according to sequence of construction;
4), select suspension centre, and member is carried out to stress and deformation analysis:
Before steel structure hoisting construction, should carry out computer stress and deformation analysis, if do not met the demands, carry out structural strengthening or suspension centre gravity treatment, guarantee to meet construction requirement;
5), set up and promote and slippage work system:
6), scheme formation, formally construction;
(5), formal construction sequence:
1), truss ground moulding bed is arranged:
Moulding bed adopts H shaped steel combination moulding bed, and specification is H300x200x6x8, and truss is the sleeping spelling of ground distributor and vertical spelling;
Truss overhead should reach 500mm, before truss is assembled, should carry out ground line, ensures the assembled quality of truss;
Between moulding bed, spacing should remain between 5m-8m, can suitably adjust;
2), assembled ground truss:
Truss installation on ground should adopt small-sized crane, and truss is assembled should follow first chord member, rear web member, the assembled order of first intermediate and then both sides;
3), truss is assembled completes, truss is set and promotes suspension centre.
2. truss hoist point is arranged on apart between two sections of edge 500mm-1000mm of truss, and suspension centre is arranged on Nodes as far as possible, and suspension centre setting does not change the stressed relation of truss as far as possible, and part can reinforce according to stressing conditions temporarily;
4), truss is promoted to and calculates absolute altitude position:
Before truss promotes, check whether all measures of structure lift unit and liquid Synchronous lifting meet design requirement, confirm errorless after, start examination and promote, promote after about 150mm by lift unit, suspend and promote;
Again check the safety of whole Hoisting System, in lifting process, the Synchronization Control between each suspension centre requires in 10mm;
5), truss carries out horizontal sliding construction:
Before slippage, reply slide rail and trailer system check, measure slide rail absolute altitude with level gauge, also will send someone to observe in slipping;
Before formal slippage, first try to slide, to confirm the feasibility of constructure scheme and the reliability of slide device; Guarantee truss synchronization of jacking up or whereabouts, control service speed well, every jacking or transfer 50mm and check once; Guarantee that truss synchronously slides, adopt computer simultaneously operating, to control sliding speed, should not exceed 300mm/min, on two slide rails, delineate in addition the graduation mark at 500mm interval, observing and controlling in real time in slipping;
6), truss slides onto installation site:
Truss slides onto behind installation site, docks and is welded to connect;
7), truss frame for connecting, remove promote and slide device, construct complete.
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| CN113666284A (en) * | 2021-08-23 | 2021-11-19 | 中建八局发展建设有限公司 | Hydraulic lifting construction method for outdoor truss steel structure |
| CN115233807A (en) * | 2022-07-26 | 2022-10-25 | 中国建筑第七工程局有限公司 | Local cantilever ultra-large steel structure corridor and construction method thereof |
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| CN117052221A (en) * | 2023-10-12 | 2023-11-14 | 中铁十四局集团有限公司 | Sliding installation method and equipment for tower mast steel structure |
| CN117052221B (en) * | 2023-10-12 | 2024-01-09 | 中铁十四局集团有限公司 | Sliding installation method and equipment for tower mast steel structure |
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